public class Main
{
    public static void main(String[] args)
    {
        Person p1 = new Person("Johnson", "Tom", "Indiana", "7654941234", 20);
        p1.print();
        System.out.println("----------------------------------");
        Student s1 = new Student("Smith", "Mary", "Illinois", "123456799", 21, "Purdue", "ECE");
        s1.print();
        System.out.println("----------------------------------");
        p1.grow();
        p1.print();
        //p1.age = 5; // error
    }
}
 